Characteristics of the Concentration Ratio of $ \hbox{SO}_{2}\hbox{F}_{2}$ to $\hbox{SOF}_{2}$ as the Decomposition Products of $\hbox{SF}_{6}$ Under Corona Discharge

Tang, Ju; Liu, Fan; Zhang, Xiaoxing; Ren, Xiaolong; Min, Fan

doi:10.1109/tps.2011.2173215

Cited by 39 publications

(26 citation statements)

References 19 publications

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“…Many utilities have already use SF 6 decomposition products as a diagnostic tool [2,8]. It has been a critical issue to recognize PD in GIS using suitable feature parameters based on SF 6 decomposition products [8,9].…”

Section: Introductionmentioning

confidence: 99%

“…Derdouri concluded that the level of SO 2 F 2 becomes independent of moisture content, whereas that of SOF 2 continues to increase slowly from 600 L/L H 2 O [14]. Zhang et al concluded that the concentrations of SO 2 F 2 and SOF 2 increase with increased moisture content [9]. But their research deviates from the practical value of moisture content in the GIS (the moisture content in GIS is usually less than 2500 L/L according to the practical experiences).…”

Section: Introductionmentioning

confidence: 99%

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Decomposition characteristics of SF₆ under partial discharges with point-to-plane electrode defect

Ding

Zhou

Ren

et al. 2013

IEEE Trans. Dielect. Electr. Insul.

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Field experience shows that the long-term existence of the partial discharge (PD) in gas-insulated switchgear (GIS) will gradually erode the insulation and ultimately cause disastrous insulation breakdown. The decomposition compound analysis of SF 6 in GIS is an effective method to diagnose the PDs caused by insulation defects. It is significant to clarify the decomposition characteristics of SF 6 under PDs, which is common in GIS. In this paper the discharge energy/charge and SF 6 decomposition under PDs with point-to-plane electrode defect were investigated under different factors such as needle curvature, applied voltage, gas pressure and moisture content (adsorbent). And the feature extraction of SF 6 decomposition under PDs was also discussed. The results show that the yields of SOF 2 , SO 2 F 2 and SO 2 tend to increase approximately linearly with the accumulation of PD energy. In addition, the needle curvature and applied voltage have a great influence on the discharge energy/charge and the yield of SOF 2 /SO 2 F 2 . Also, the adsorbents composed of KDHF-03 or F-03 have a certain effect on the discharge energy. Besides, the discharge energy and charge tend to decrease with the increased moisture content, and the yields of SOF 2 , SO 2 F 2 and SO 2 are affected by the humidity (250 L/L -2500 L/L) observably.Index Terms -Decomposition compound analysis, gas insulated switchgear, pointto-plane electrode defect, SF 6 .

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Decomposition characteristics of SF₆ under partial discharges with point-to-plane electrode defect

Ding

Zhou

Ren

et al. 2013

IEEE Trans. Dielect. Electr. Insul.

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“…With increasing micro-water content, the contents of SOF 2 , SO 2 F 2 , and CO 2 increased; moreover, the value of c(SO 2 F 2 )/c(SOF 2 ) gradually decreased and stabilized, which meets the power function relationship. 11,12 Research on the characteristics of C 5 F 10 O often ignores the influence of micro-water. The results often deviate from the real situation, which is not conducive to accurate and comprehensive analysis of the decomposition characteristics of the insulating medium.…”

Section: Introductionmentioning

confidence: 99%

Effects of micro-water on decomposition of the environment-friendly insulating medium C5F10O

Xiao

Zhang

et al. 2017

AIP Advances

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SF6 is widely used in all kinds of high-voltage electrical equipment because of its excellent insulation and arc-extinguishing performance. However, this compound leads to serious greenhouse effect, which harms the environment. Many research institutions are now actively in search of SF6 alternative gas. C5F10O has attracted much attention as an alternative gas with low global warming potential (GWP) and excellent dielectric strength. In this paper, we analyzed the possible decomposition paths of C5F10O under micro-water environment through density functional theory. We also evaluated the ionization parameters and toxicity of the decomposition products. The results show that OH• and H• produced by H2O exhibited a catalytic effect on the decomposition of C5F10O. CF4, C2F6, C3F6, C3F8, C4F10, C5F12, C6F14, C3F7COH, C3F7OH, CF3COH, C3F7H, and CF3OH were produced in the micro-water environment. Based on molecular configuration calculation, the ionization parameters of these products were inferior to perfluorocarbons, such as C3F8, leading to reduced insulation performance of the system. Moreover, CF2O and HF are hazardous to human health and equipment safety. Results will provide a basis for further study of the insulation characteristic of the C5F10O gas mixture under micro-water condition to guide the formulation of their relevant international standards prior to engineering applications.

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“…In contrast to these components, SO 2 F 2 and SOF 2 are the more obvious and stable factors of SF 6 decomposition under PD. They can also effectively reflect the deterioration degree of the SF 6 insulation property and the strength of the PD energy [7,17]. Hence, SO 2 F 2 and SOF 2 are selected as the most characteristic components to represent the influence regularity of different metal electrode materials on SF 6 decomposition characteristics under PD.…”

Section: Influence Regularity Of Metal Electrodementioning

confidence: 99%

Influence Regularity of Aluminum, Copper and Stainless-steel on SF₆ PD Decomposition Characteristics Components

Zeng¹,

Luo²,

Tang³

et al. 2017

Journal of Electrical Engineering and Technology

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-SF 6 decomposition products can be used to detect partial discharge (PD), but the metal materials in a PD area can significantly affect SF 6 decomposition characteristics. Disregarding the effect of metal materials on such characteristics inevitably result in certain errors when using them to diagnose the internal insulation faults of gas-insulated switchgears. This paper investigates the influence regularity on the main stable decomposition components of SF 6 (namely SO 2 F 2 and SOF 2 ) of the commonly metal materials uesd in GIS, such as aluminum (Al), copper (Cu) and stainless steel (SS). Firstly, an experimental platform is constructed to simulate SF 6 decomposition under a PD area, and the influence regularities of Al, Cu and SS on the concentration, formation rate and saturation time of SO 2 F 2 and SOF 2 are obtained. Secondly, the influence mechanism of Al, Cu and SS are preliminary explored combined with the chemical activity of the metal materials.

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Characteristics of the Concentration Ratio of $ \hbox{SO}_{2}\hbox{F}_{2}$ to $\hbox{SOF}_{2}$ as the Decomposition Products of $\hbox{SF}_{6}$ Under Corona Discharge

Cited by 39 publications

References 19 publications

Decomposition characteristics of SF₆ under partial discharges with point-to-plane electrode defect

Decomposition characteristics of SF₆ under partial discharges with point-to-plane electrode defect

Effects of micro-water on decomposition of the environment-friendly insulating medium C5F10O

Influence Regularity of Aluminum, Copper and Stainless-steel on SF₆ PD Decomposition Characteristics Components

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Characteristics of the Concentration Ratio of $ \hbox{SO}_{2}\hbox{F}_{2}$ to $\hbox{SOF}_{2}$ as the Decomposition Products of $\hbox{SF}_{6}$ Under Corona Discharge

Cited by 39 publications

References 19 publications

Decomposition characteristics of SF6 under partial discharges with point-to-plane electrode defect

Decomposition characteristics of SF6 under partial discharges with point-to-plane electrode defect

Effects of micro-water on decomposition of the environment-friendly insulating medium C5F10O

Influence Regularity of Aluminum, Copper and Stainless-steel on SF6 PD Decomposition Characteristics Components

Contact Info

Product

Resources

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Decomposition characteristics of SF₆ under partial discharges with point-to-plane electrode defect

Decomposition characteristics of SF₆ under partial discharges with point-to-plane electrode defect

Influence Regularity of Aluminum, Copper and Stainless-steel on SF₆ PD Decomposition Characteristics Components